permutations of a 6! numerically

[GerdW]

Hi John,

look for the "Application Control" functions palette. "Open VI Reference" and "Call by Reference" might be interesting...

[Ben]

Can recursion be used for this challenge wiht LV 8.2?

Somewhere in there we picked-up the option to share clones but without that option, it may blow-up in LV 8.2 due to a lack of memory.

Ben

[jacobdiemer]

What would be wrong with just using a while loop that counts to 1000000. Convert each iteration to a string, filter out any number with [0,7-9], then do a simple search and replace (1=A, 2=B, etc).

Of course, it gives you repeat letters and lengths shorter than 6, but those should be easily filtered as well.

Not elegant or super fast (takes a few seconds to build it to an array, didn't try writing directly to a file), but certainly easy.

[John Pierson]

Its simple, and the filtering would be straight forward,

its not elegant but that would work.

hmm, nice idea. And it would be easy to see if it worked, run a line count compare to n! for that number and check for repeats and remove.

That might just do it.

I'll give it a go! 😄

[altenbach]

Here's a quick modification (LabVIEW 8.0), adapted from this much more complex problem. 😉

[altenbach]

... and here is the same using plain strings:

[John Pierson]

sweet, here's hoping it'll run on LV v8.2 😄

[altenbach]

Sorry, down-conversion to 8.0 will get rid of the in-place structure, so the attached 8.0 VI is a bit ugly. To simplify, you can remove the inner while loop without breaking anything.

Here's the string version as a 2009 VI for those who upgraded.

[altenbach · Accepted solution]

Here is a cleaned up 8.0 version:

of course you need to be careful. Don't use very long strings or it will break because of datatype limitations. 😉

[John Pierson]

yup, that does the job perfectly, can even be expanded for 7, 8 etc... itterations.

does waht i needed and more 😄

now to write to a notpad file 😄